10 Power-Saving Features

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1、Section10.Power-SavingFeaturesHIGHLIGHTSThissectionofthemanualcontainsthefollowingmajortopics:10.1Introduction..................................................................................................................10-210.2MicrocontrollerClockManipulation....

2、..........................................................................10-210.3Instruction-BasedPower-SavingModes......................................................................10-210.4DozeMode..................................................................

3、.................................................10-610.5SelectivePeripheralPowerControl.............................................................................10-610.6DesignTips.....................................................................................

4、.............................10-910.7RelatedApplicationNotes..........................................................................................10-1010.8RevisionHistory..............................................................................................

5、...........10-1110Power-SavingFeatures©2006MicrochipTechnologyInc.AdvanceInformationDS39698A-page10-1PIC24FFamilyReferenceManual10.1INTRODUCTIONAllPIC24Fdevicesofferanumberofbuilt-instrategiesforreducingpowerconsumption.Thesecanbeparticularlyusefulinapplicationswhicha

6、rebothpower-constrained(suchasbatteryoperation),yetrequireperiodsoffull-poweroperationfortiming-sensitiveroutines(suchasserialcommunications).Thissectiondiscussesthefourpower-savingfeaturesimplementedinhardware:•MicrocontrollerClockManipulation•Instruction-BasedPower-

7、SavingModes(SleepandIdle)•Hardware-BasedDozeMode•SelectivePeripheralControl10.2MICROCONTROLLERCLOCKMANIPULATIONIngeneral,reducingthemicrocontrollerclockspeedforanyapplicationwillresultinapowersavingthatisroughlyproportionaltotheclockfrequencyreduction.PIC24Fdevicesall

8、owforawiderangeofclockfrequenciestobeselectedunderapplicationcontrol.Ifthesystemclockconfigurationisnotlocked,userscanswitch